DTC P0575: Cruise Control Input Circuit: Procedure

WARNING: This page is about a different car, the 2012 Lexus GX 460. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC
1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Perform the following to make sure the DTC detection conditions are met.
  HINT:
  
  If the detection conditions are not met, the system cannot detect the malfunction.
  1. Drive the vehicle at a speed of 50 km/h (30 mph) or more.
  2. Turn the cruise control switch on.
  3. Push the cruise control switch to -SET to activate cruise control.
3. Check for DTCs. Refer to DTC CHECK / CLEAR .
  OK
  
  DTC P0575 is not output.
NG → See step 3

OK → See step 2
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
REPLACE ECM. Refer to REMOVAL